At approximately 3:50 p.m. on July 21, 2016, the Billerica Police Communications Center received numerous 911 calls regarding a pedestrian who was struck by a motor vehicle at 800 Boston Road/Route 3A.

Upon arrival to the scene, Officers learned that a 35-year-old woman from Chelmsford was traveling northbound on Route 3A in a 2013 GMC Acadia when she struck a 14-year-old juvenile from Billerica who was on a bicycle crossing the street.

The juvenile sustained serious injuries and was taken by ambulance to an area hospital.

The woman was not injured and remained at the scene. She was the sole occupant of the vehicle.

Boston Road is closed in both directions from Cardington Avenue to Cook Street. Drivers are asked to seek alternatives routes. The Massachusetts State Police Collision Analysis and Reconstruction Section is responding to the scene.